The HDR, Hot Dry Rock, collection presents the record of the Hot Dry Rock program. This program, exploring geothermal energy development, was conceptualized by LANL researchers with field work conducted at Fenton Hill, NM. The collection is comprised of informal documents, reports, journal and conference papers, and experimental data. The program was most active from 1970 to 1996. The collection will be updated by batch uploads until the entire, historical, collection is represented in the repository.